Yellow buses. You can catch 1b from Lansdowne roundabout – come out of Bournemouth station and turn right past asda, walk right to the top of Holdenhurst rd. Get off at junction of Beaufort rd and Cranleigh rd. Or from just outside Pokesdown station.
The 33 also goes from Pokesdown, or if you’re using the campsite at Yeoman’s rd, catch it from Royal Bournemouth Hospital (RBH) in Castle lane.